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Oceniono jakość jaj perlic perłowoszarych i białych w 51. tygodniu życia ptaków. Oceniano po 30 jaj z każdej odmiany. Badania wykonano w ciągu 24 godzin po pozyskaniu jaj. Perlice białe znosiły jaja o istotnie większej masie (46,5 g), długości (51,3 mm) i szerokości (39,6 mm) w porównaniu z perlicami perłowoszarymi (odpowiednio: 39,2 g, 49,4 i 37,5 mm). Ponadto jaja perlic perłowoszarych miały lżejszą...
Investigated were three crossbred duck broiler groups: heavy Star 63, PP54, and Dworka (CaA15),20 males (M) and 20 females (F) per group. The birds were kept in pens on rye straw, in a separate closed building with regulated environmental parametres, and fed ad libitum standard commercial feed mixtures. Body weight was recorded on day 1 and then on week 3 and 7 of birds’ life, and feed consumption...
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